Save $15
Pinch or double tap to zoom
Customer Photos
Save $15
Our antibacterial, moisture-wicking Merino wool briefs were made to keep you cool and comfy. Learn More
Select Color (0/3 selected)
Black
Navy
Charcoal
Iceberg
Harbor Grey
Forest
Select Size
Size guide

Free shipping & returns in the US

Our antibacterial, moisture-wicking Merino wool briefs were made to keep you cool and comfy. Learn More
Select Colors
or interest-free payments of $30 with
Why our customers
love us
Our founder
reveals all
  • Odor resistant Odor resistant
  • Temperature regulating Temperature regulating
  • Fast drying Fast drying
  • Anti-wrinkle Anti-wrinkle
The Fit
The Details
  • 84% Merino wool, 12% nylon and 4% spandex
  • 180gsm
  • Woven elastic waistband
  • 5.5" Inseam on all sizes
  • Fiber micron: Superfine 18.5
15 µm
18.5 µm
25 µm
Care instructions
  • Machine wash warm gentle
  • Do not bleach
  • Temble dry low termperature
  • Iron in low temperature
  • Dry clean any solvent except Trichloroethylene
Merino Care 101
Watch video

METICULOUSLY CRAFTED FOR YOUR COMFORT

  • Odor-resistant and antibacterial.
  • Less washing with antibacterial clothing that stays dry, clean and fresh.
  • Dries really fast, keeping you comfortable.
  • Performs better than cotton and synthetics.
  • Tag-free band to prevent rubbing.

As featured in

NATURE'S MIRACLE FABRIC

Merino wool fibers allow it to wick moisture away from your skin, which ensures comfort and moisture management. Merino wool’s complex structure locks odor molecules within the fiber and only releases them on washing. This ensures Merino wool resists unpleasant odors often experienced with other fibers.

Never Smells

Never Smells

Dries Really Fast

Dries Really Fast

Wicks Moisture

Wicks Moisture

Perfect for packing

Perfect for packing

NATURE'S MIRACLE FABRIC

SOFTER THAN COTTON

This wool isn’t like your typical itchy sweater. We only use superfine (18.5 micron) Merino wool, resulting in a luxuriously silky soft, shirt that’s lighter and much softer than the average Merino or cotton shirt. It'll also maintain its form over time and not get ruined after a wash, like most clothes these days.

Learn more about the benefits of Merino wool
Watch video
NATURAL AIRFLOW

NATURAL AIRFLOW

With Merino, your body heat can pass through the space between our woven superfine fibers, regulating your body temperature and keeping you cool & comfortable.

ENHANCED DURABILITY

ENHANCED DURABILITY

When designing our briefs, we went the extra step of blending each Merino fiber with Nylon and Spandex for extra durability and stretch. You'll also find a tag-free, ultra-soft waistband that prevents irritation--definitely a plus for long treks. This is Merino wool underwear designed to take you places.

EASY CARE

EASY CARE

You won’t have to wash these briefs much at all. However, when it comes time for a refresh, simply add it to your load at the normal or cool temperature setting and then lay flat to dry.

ABOUT OUR WOOL

  • Sustainably sourced from independent, cruelty-free wool farms.
  • Woolmark® certified Merino wool means you can expect the highest standards related to fiber content, performance, color fastness, and dimensional stability.
  • WRAP (Worldwide Responsible Accredited Production) certified production.
  • Tested to ensure our clothing stands up to the rigors of travel and continual use.
Woolmark
WRAP

Perfect for Travel

What People Are Saying

Customer Reviews
4.8 Based on 778 Reviews
5 ★
87% 
674
4 ★
8% 
60
3 ★
3% 
20
2 ★
2% 
13
1 ★
0% 
11
Customer Photos
Write a Review Ask a Question

Thank you for submitting a review!

Your input is very much appreciated. Share it with your friends so they can enjoy it too!

Filter Reviews:
DC
03/30/2025
Dwayne C.
United States

Waistband is no bueno!

I have really liked everything I have bought from Unbound EXCEPT for these boxer briefs. Waistband is too tight and rolls on me. I bought pairs from 2 other merino wool companies (same size L) and I don’t have the same problem with them. Plus they were cheaper. Wish I didn’t buy two pairs as these just don’t work for me at all.

  • How did you find the fit? Runs SmallSlightly SmallTrue To SizeSlightly BigRuns Big
AP
03/28/2025
Anthony P.
Canada

Awesome undies!

A little tight in the waistband but totally forgettable as in you hardly know your wearing anything at all!

  • How did you find the fit? Runs SmallSlightly SmallTrue To SizeSlightly BigRuns Big
EZ
03/22/2025
Ezra Z.
United States

Fantastic quality, odd fit

These are wonderful. They are true to size but the fit is a bit weird. They are a bit "tall" and want to ride higher than normal underwear. I also wish there was a pocket in the front. Not my favorite cut, but the quality is great and I'll buy more unbound.

  • How did you find the fit? Runs SmallSlightly SmallTrue To SizeSlightly BigRuns Big
DD
03/21/2025
DENNIS D.
United States

Pay attention to waist measurements in the unbound size chart

Love the merino against the skin and cut of these boxer briefs, but the elastic waist is boa-strong after a few hours of wear. My bad. I should have heeded the size chart and ordered L not M. Out of habit I ordered M because that's what typically fits me best.

  • How did you find the fit? Runs SmallSlightly SmallTrue To SizeSlightly BigRuns Big
C
03/20/2025
Charles
United States

Good service, poor product

The underwear started to wear out on the bottoms and became transparent until small holes started to form. The waist band also came apart and started fraying. Customer service was good as they gave me a refund. These did not last as long as I wanted it to.

  • How did you find the fit? Runs SmallSlightly SmallTrue To SizeSlightly BigRuns Big